/Engine/Source/Editor/VREditor/Public/VREditorMode.h
Derived classes can override this to return a derived state struct, and add their own saved state.
virtual [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FBaseSavedEditorState](API\Editor\VREditor\UVREditorModeBase\FBaseSavedEditorState) > CreateSavedState()